http://oxzactmk62kn5n6sos7psm35km64naom3qfuogxry6fi45vgmgkwvjyd.onion/product-category/poisons
Botulinum toxin is possibly the most toxic substance known, with an average lethal dose of about 1 nanogram per kilogram (ng/kg), meaning that a few hundred grams could theoretically kill every human being on Earth. (For perspective, the rat poison strychnine, often described as highly toxic, has an LD50 of 1,000,000 ng/kg, and therefore it would take about six metric tons to kill all humans.)